How is white blister growing on 3 years old child foot to return a responsibility

White blisters on the feet of three-year-olds may be caused by excessive walking, wear and tear from misfitting shoes, fungal infections or herpes virus infections. Fungal infections should be treated with antifungal drugs, herpes virus infections should be treated with antiviral drugs, and antihistamines and corticosteroids should be used if necessary.